JP2008121552A - Ceiling fan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ceiling fan capable of securing a blowing function with a compact motor without substantially altering a horizontally-long slim shape of a blade and of providing an excellent design property. <P>SOLUTION: A ceiling fan is equipped with a plurality of blades 3 radially arranged with a motor 2 suspended on a ceiling surface 1 as a center. In the root part 4 and tip part 5 of the blade 3, mounting angles 6 are made small. The high performance part 7 is provided in the vicinity of the center of the blade 3, wherein the mounting angle 6 of the high performance part is made large. By this setup, the fan can secure a blowing function with a compact motor 2 without substantially altering a horizontally-long slim shape of the blade 3 and offer an excellent design property. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a ceiling fan in which a plurality of blades are attached to a motor suspended from a ceiling surface.

  Conventionally, a ceiling fan in which a plurality of blades are provided on a motor suspended on a ceiling surface is known as an example of this type of ceiling fan (see, for example, Patent Document 1).

  Hereinafter, the ceiling fan will be described with reference to FIG.

As shown in the figure, the outer rotor type motor 102 is built in the main body 101 of the ceiling fan, the fixed shaft 104 is press-fitted and fixed to the stator 103 of the motor 102, and the main body 101 is attached to the ceiling surface at the upper end portion of the fixed shaft 104. The control box 105 is attached to the lower end portion of the fixed shaft 104 and the blades 106 are radially attached to the lower surface of the rotor 107 of the motor 102.
Japanese Patent No. 3032352 ([0019] FIGS. 1 and 3)

  In such a conventional ceiling fan, there is a problem that the blade shape is flat, the fan efficiency is poor, and the motor load is large, and it is required to maintain the air blowing function with a small motor.

  The present invention solves such a conventional problem, and can maintain a blowing function with a small motor without significantly changing the horizontal slim shape of the blade, and has a superior design. The purpose is to provide fans.

  In order to achieve the above object, the ceiling fan of the present invention comprises a plurality of blades radially positioned around a motor suspended from a ceiling surface, and has a small mounting angle at the root and tip of the blade. The high function part is provided near the center of the blade, and the mounting angle of the high function part is increased.

  By this means, it is possible to maintain a blowing function with a small motor without significantly changing the horizontally long slim shape of the blade, and a ceiling fan excellent in design can be obtained.

  Another means is that the warp width dimension of the root part and the tip part of the blade is reduced, and the warp width dimension of the high-functional part provided near the center of the blade is increased.

  By this means, it is possible to maintain a blowing function with a small motor without significantly changing the horizontally long slim shape of the blade, and a ceiling fan excellent in design can be obtained.

  Another means is that the high-functional part of the blade is provided in a range of 15 to 80% of the blade length.

  By this means, it is possible to obtain a ceiling fan that can obtain the wind speed and the air volume without reducing the rotational speed of the motor.

  Another means is to distinguish the high-functional part of the blade from other parts by changing the surface roughness or forming grooves.

  By this means, it is possible to obtain a ceiling fan that can be easily understood by the user that the shape is a regular deformed shape, and that the shape of the high-function part can be easily managed in the manufacturing stage.

  Another means is that the blade cross-sectional shape D at the base of the blade is formed into an S shape whose bending direction changes along the way.

  By this means, it is possible to obtain a ceiling fan that can increase the blade strength at the base portion of the blade and increase the blade size.

  In another means, the material of the blade is PPG.

  This means that the wind speed and air volume can be improved, and even if the blade has a complicated shape, the design tolerance can be increased, so that the exterior shape can be made smart with design. A ceiling fan can be obtained.

  Another means is that a blade cover is provided at the base of the blade so as to cover the front edge of the blade.

  By this means, it is possible to obtain a ceiling fan that makes it easy to increase the overall length of the blade and increase the rotational speed of the motor without increasing the outer dimension of the root portion.

  Another means is that the blade cover provided at the front edge of the blade is formed with a curved surface substantially equal to the root of the blade forming a smooth uneven surface.

  By this means, it is possible to obtain a ceiling fan that can suppress a loss with respect to the flow of wind and prevent a reduction in the number of rotations of the motor.

  In another aspect, the blade attachment portion for attaching the blade to the motor is provided integrally with the blade cover, the guide portions are provided on both sides of the blade attachment portion, and the blade is provided on the rotor of the motor. It can be inserted into the boss.

  By this means, it becomes easy to fit the guide portion of the blade attachment portion into the blade boss of the motor at the time of construction, and a ceiling fan that can improve the workability can be obtained.

  Another means is provided with temporary fixing means for temporarily fixing the blade when the guide portion of the blade mounting portion is fitted into a blade boss formed on the rotor of the motor.

  With this means, a temporary fixing can be easily performed along with a series of operations, and a ceiling fan that can improve workability can be obtained.

  According to the present invention, it is possible to provide a ceiling fan that can maintain the air blowing function with a small motor without significantly changing the horizontally slim shape of the blade and is excellent in design.

  In addition, it is possible to provide a ceiling fan that has the effect of being able to obtain the wind speed and air volume without reducing the rotational speed of the motor.

  In addition, it is possible to provide a ceiling fan that can easily understand that the high-functional part of the blade has a regular deformed shape for the user and that the shape of the high-functional part can be easily managed in the manufacturing stage.

  Moreover, the blade | wing intensity | strength of the base part of a braid | blade can be raised and the ceiling fan with the effect that a braid | blade with a full length dimension can be rotated safely can be provided.

  In addition to improving the wind speed and air volume, even if the blade has a complicated shape, the design tolerance can be increased, so the external shape of the blade must be a smart shape that matches the interior. It is possible to provide a ceiling fan that is effective.

  In addition, it is possible to provide a ceiling fan that has the effect of increasing the overall length of the blade and increasing the rotational speed without increasing the width and thickness dimensions of the root portion of the blade.

  Further, it is possible to provide a ceiling fan that can suppress the resistance loss of the wind at the root portion of the blade, prevent the rotation speed from being reduced, and maintain the air volume.

  Moreover, it becomes easy to fit the guide part of the blade attachment part into the blade boss of the motor at the time of construction, and it is possible to provide a ceiling fan that is effective in improving workability.

  Moreover, temporary fixing can be easily performed together with a series of operations, and a ceiling fan having an effect of improving workability can be provided.

  The invention according to claim 1 of the present invention comprises a plurality of blades radially arranged around a motor suspended from a ceiling surface, and has a small mounting angle at the root and tip of the blade, and the blade A high-functional part is provided near the center of the motor, and the mounting angle of the high-functional part is large, and when a ceiling fan with a large blade length is rotated by a small motor to obtain the wind speed and air volume, Since the output is small, it is difficult to increase the rotation, and the wind speed and volume are also reduced. However, in the vicinity of the blade base where the suction speed is low and the wind speed is low, and in the vicinity of the blade periphery, where the blade length is large and the air flow is very large compared to the vicinity of the blade root, the work of the blade is influenced and the load of the blade, i.e. By reducing the mounting angle, which has a large effect on the torque, and increasing the blade mounting angle only in the vicinity of the center of the blade, where the main flow of the ceiling fan is easy to pass and the work load is large, Even if the overall length is increased, the wind speed and the air volume can be obtained without reducing the rotational speed of the motor. Therefore, the air blowing function can be maintained with a small motor without significantly changing the horizontally long slim shape of the blade, and a ceiling fan with excellent design can be obtained.

  The invention according to claim 2 of the present invention is such that the warp width dimension of the root part and the tip part of the blade is small, and the warp width dimension of the high-functional part provided near the center of the blade is large. By providing a high-function part with a larger warp width dimension near the center of the blade and reducing the warp width dimension at the root and tip of the blade, the load on the motor torque is reduced except for the high-function part. In the high-function part, the mainstream of the ceiling fan can easily pass through and the work volume can be increased, so even if the overall length of the blade is increased even though it is a small motor, the wind speed and air volume can be reduced without reducing the rotational speed. Can be obtained. Therefore, the air blowing function can be maintained with a small motor without significantly changing the horizontally long slim shape of the blade, and the design is excellent.

  In the invention according to claim 3 of the present invention, the high-functional part of the blade is provided in a range of 15 to 80% of the blade length, and the high-functional part arranged near the center of the blade is By providing it in the range of 15 to 80%, it can be provided in a range that avoids the fan efficiency and motor efficiency reduction areas at both ends of the blade, and the overall length of the blade is increased while being a small motor. However, there is an effect that a predetermined wind speed and air volume can be obtained without reducing the rotational speed of the motor.

  Further, the invention according to claim 4 of the present invention distinguishes the high-function part of the blade from other parts by changing the surface roughness or forming a groove, and compared with a general flat blade, In order to be able to identify only the high-function part in the blade of the implementation, by changing the surface roughness of the high-function part or surrounding it with a groove, it can be clearly displayed that the form is intentionally formed, and the user On the other hand, it can be easily understood that the shape is a regular deformed shape, and the shape of the high-functional part can be easily managed in the manufacturing stage.

  In the invention according to claim 5 of the present invention, the blade cross-sectional shape at the base of the blade is formed into an S-shape whose bending direction changes in the middle, and the blade cross-sectional shape in the vicinity of the blade base is an S-shape. This makes it possible to increase the blade strength at the base of the blade while reducing the mounting angle and warpage width of the blade, which has a large effect on the motor torque, and to safely rotate the blade with a large overall length. Has the effect of being able to.

  Further, the invention according to claim 6 of the present invention is such that the blade material is PPG, and it is possible to use PPG containing long fiber glass material in polypropylene for the blade material. Since the strength of the blade can be secured and the reinforcing ribs on the blade suction surface can be removed, loss due to the reinforcing ribs can be reduced, wind speed and air volume can be improved, and even when the blade has a complicated shape Since the allowable range in design can be increased, the appearance shape can be a smart shape that matches the interior.

  According to the seventh aspect of the present invention, a blade cover is provided at the base of the blade so as to cover the front edge of the blade, and the blade extends so as to cover the front edge of the blade. Since the cover can reinforce the root of the blade, which is stressed when the blade rotates, the overall length of the blade can be increased without increasing the outer diameter of the root, and the number of rotations of the motor It has the effect that it becomes easy to rise.

  In the invention according to claim 8 of the present invention, the surface of the blade cover provided on the front edge of the blade is formed with a curved surface substantially equal to the root portion of the blade forming a smooth uneven surface. By making the curved surface of the blade cover a curved surface that is substantially equal to the surface of the root portion of the blade, it is possible to suppress a loss with respect to the wind flow and to prevent a reduction in the number of rotations of the motor.

  According to a ninth aspect of the present invention, a blade attachment portion for attaching a blade to a motor is provided integrally with a blade cover, guide portions are provided on both sides of the blade attachment portion, and the guide portion is provided on the motor. The blade cover can be fitted into the blade boss, and the blade cover and blade mounting part are integrated, and the guide parts projecting on both sides of the blade mounting part are provided, so that the guide part of the blade mounting part during construction Can be easily inserted into the blade boss of the motor, and the workability can be improved.

  According to a tenth aspect of the present invention, there is provided temporary fixing means for temporarily fixing the blade when the guide portion of the blade mounting portion is fitted into a blade boss formed on the rotor of the motor. By providing temporary fixing means that can lock the blade to the blade boss formed on the rotor, the blade can be easily inserted into the motor mounting portion during construction, and the temporary fixing means that can lock the blade to the blade boss functions. Since the guide portion is guided to the position, temporary fixing can be easily performed together with a series of operations, and the workability can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1 to FIG. 4, the blade 3 is arranged radially around the motor 2 suspended from the ceiling surface 1, and the mounting angle 6 is made small at the root portion 4 and the tip portion 5 of the blade 3, The high function portion 7 is provided near the center of the blade 3, the mounting angle 6 of the high function portion 7 is provided large, and the shape of the root portion 4 and the tip portion 5 of the blade 3 is warped so that the dimension of the width 8 becomes large. Provide.

  Further, the high-functional part 7 of the blade 3 is provided in a range of 15 to 80% of the blade length 9, and the high-functional part 7 of the blade 3 is provided with a surface roughness or a groove 10 so that it can be distinguished from other parts. The blade cross-sectional shape 11 of the root portion 4 of the blade 3 is formed in an approximately S shape so that the bending direction changes in the middle, and a plurality of ribs are formed on the back surface of the blade 3 in the length direction of the blade 3. 12 and the blade 3 is made of PPG made of polypropylene and a glass material of long fibers.

  In the above configuration, the blades 3 are arranged radially around the motor 2 suspended from the ceiling surface 1, the mounting angle 6 is made small at the root portion 4 and the tip portion 5 of the blade 3, and the center of the blade 3 is arranged. Since the high function part 7 is provided in the vicinity and the mounting angle 6 of the high function part 7 is provided large, an attempt is made to rotate the ceiling fan with a large fan outer diameter 13 by the small motor 2 to obtain a predetermined wind speed and air volume. In this case, since the motor 2 is small, it is difficult to increase the rotation, and the wind speed and the air volume are also reduced.

  However, the tip 5 of the blade 3 near the outer periphery of the blade 3 where the wind speed is small and the main portion of the blade 3 where the suction main flow is difficult to reach and the fan 3 has a large outside diameter 13 and the wind speed is much higher than the vicinity of the root 4 of the blade 3. The blade 3 influences the work of the ceiling fan and reduces the mounting angle 6 which has a large influence on the load of the ceiling fan, that is, the torque of the motor 2, so that the mainstream of the ceiling fan can easily pass through and the blade 3 can easily take up the work. By increasing the attachment angle 6 of the blade 3 only in the high-function portion 7 near the center of the motor, even if the fan outer diameter 13 is increased even though the motor 2 is small, the rotation speed is not reduced and the predetermined wind speed and air volume are reduced. Can be obtained. Therefore, the air blowing function can be maintained by the small motor 2 without significantly changing the horizontally long slim shape of the blade 3, and a ceiling fan excellent in design can be obtained.

  Further, since the shape of the root portion 4 and the tip portion 5 of the blade 3 is made smaller in the warp width 8 and the warp width 8 of the high function portion 7 provided near the center of the blade 3 is made larger, the blade 3 A high function portion 7 having a larger warp width 8 of the blade 3 is provided near the center of the blade 3, and the warp width 8 is reduced at the root portion 4 and the tip portion 5 of the blade 3. Then, the load of the ceiling fan, that is, the torque load of the motor 2 is reduced, and the main part of the ceiling fan can easily pass through the high function portion 7 and the work can be increased. Even if the diameter 13 is increased, a predetermined wind speed and air volume can be obtained without reducing the rotational speed. Therefore, the air blowing function can be maintained by the small motor 2 without significantly changing the horizontally long slim shape of the blade 3, and the design is excellent.

  In addition, since the high-functional portion 7 of the blade 3 is provided in the range of 15 to 80% of the blade length 9, the high-functional portion 7 is provided in a range that avoids the areas where the fan efficiency and the motor efficiency at both ends of the blade 3 are reduced. Even if the fan outer diameter 13 is increased even though the motor 2 is small, a predetermined wind speed and air volume can be obtained without reducing the rotational speed of the motor 2.

  Further, since the high-function part 7 of the blade 3 is distinguished from other parts by the change of the surface roughness or the formation of the groove 10, the high-function part 7 in the blade 3 of Embodiment 1 is compared with the general flat blade. Since only the shape is irregular, it can be clearly displayed that the shape is intentionally formed by changing the surface roughness or by enclosing it with the groove 10, and it should be a regular deformed shape for the user. Can be easily understood, and the shape management of the high function part 7 can be easily performed in the manufacturing stage.

  In addition, since the blade cross-sectional shape 11 of the root portion 4 of the blade 3 is formed into an S shape whose bending direction changes in the middle, the blade cross-sectional shape 11 near the root portion 4 of the blade 3 is formed into an S shape. In addition to affecting the work of the ceiling fan, it is possible to increase the blade angle of the root portion 4 of the blade 3 while reducing the mounting angle 6 and the warp width 8 that greatly affect the load of the ceiling fan, that is, the torque of the motor 2. Therefore, the size of the blade 3 can be increased.

  In addition, by using PPG containing long fiber glass material in polypropylene as the material of the blade 3, the strength of the blade 3 can be secured, and the reinforcing ribs on the suction surface of the blade 3 can be removed. Loss due to reinforcing ribs can be reduced and wind speed and air volume can be improved. Even if the blade 3 has a complicated shape, the design tolerance can be increased, so the exterior shape is smart enough to match the interior. It can be made into a shape.

(Embodiment 2)
As shown in FIGS. 5 and 6, a blade cover 15 is provided at the base portion 4A of the blade 3A so as to cover the front edge portion 14 of the blade 3A, and the blade cover 15 provided with the front edge portion 14 of the blade 3A is provided. The surface is formed by a curved surface 16A that is substantially equal to the root portion 4A of the blade 3A that forms the uneven surface 16 having a smooth surface.

  In the above configuration, since the blade cover 15 is provided on the root portion 4A of the blade 3A so as to cover the front edge portion 14 of the blade 3A, the blade cover 15 is applied to the root of the blade 3A that is stressed when the blade rotates. The portion 4A can be strengthened, and it is possible to increase the overall length of the blade and increase the rotational speed of the motor without increasing the width and thickness of the base portion 4A.

  Further, the blade cover 15 provided on the front edge portion 14 of the blade 3A has a surface formed by a curved surface 16A that is substantially equal to the root portion 4A of the blade 3A that forms an uneven curved surface 16 having a smooth surface. By making the curved surface 16A of 15 the curved surface 16 substantially equal to the surface of the root portion 4A of the blade 3A, the wind resistance received by the blade cover 15 can be made substantially equal to the wind resistance of the root portion 4A of the blade 3A. The wind resistance at the time of rotation can be suppressed to a low level, and the reduction in the number of rotations can be prevented and the air volume can be maintained.

(Embodiment 3)
As shown in FIGS. 7 to 11, a blade attachment portion 17 for attaching the blade 3B to the motor 2A is provided integrally with the blade cover 15A, guide portions 18 are provided on both sides of the blade attachment portion 17, and the guide portions 18 are provided. The blade 3B is provided so that it can be fitted into the blade boss 20 provided in the rotor 19 of the motor 2A, and the blade 3B can be temporarily fixed when the guide portion 18 of the blade mounting portion 17 is fitted into the blade boss 20 formed in the rotor 19 of the motor 2A. As the fixing means 21, the outer side of the blade 3 </ b> B is slightly inclined downward by its own weight by engaging the curved protrusion 23 provided in the blade attachment portion 17 with the temporary fixing hole portion 22 provided on the rotor 19 side. The blade 19 of the rotor 19 is temporarily fixed to the blade boss 20.

  In the above configuration, the blade attachment portion 17 for attaching the blade 3B to the motor 2A is provided integrally with the blade cover 15A, the guide portions 18 are provided on both sides of the blade attachment portion 17, and the guide portion 18 is attached to the rotor 19 of the motor 2A. Since it is possible to fit into the provided blade boss 20, the guide portion 18 of the blade mounting portion 17 can be easily fitted into the blade boss 20 of the motor 2 </ b> A at the time of construction, and workability can be improved.

  Further, since the blade boss 20 formed on the rotor 19 of the motor 2A is provided with the temporary fixing means 21 that can temporarily fix the blade 3B when the guide portion 18 of the blade mounting portion 17 is fitted, the blade 3B is attached to the motor 2A during construction. Since the guide portion 18 is guided to the position where the temporary fixing means 21 capable of locking the blade 3B to the blade boss 20 is functioned, the temporary fixing can be easily performed together with a series of operations. Therefore, the workability can be improved.

  The ceiling fan according to the present invention has an effect that it can maintain a blowing function with a small motor without significantly changing the slim shape of the horizontally long blade, and has an excellent design property, and is suspended on a ceiling surface. It is useful as a ceiling fan or the like in which a plurality of blades are attached to a lowered motor.

The figure which shows the ceiling fan of Embodiment 1 of this invention ((a) side view, (b) sectional drawing of a blade) Front view of the blade showing the high-function part of the ceiling fan Sectional view showing blade cross-sectional shape of the ceiling fan Perspective view of the ceiling fan The front view of the ceiling fan of Embodiment 2 of this invention Sectional view showing the relationship between the blade and blade cover of the ceiling fan Floor plan of the ceiling fan according to the third embodiment of the present invention Enlarged view of the base of the ceiling fan Front view showing the mounting state of the blade of the ceiling fan Front view of the motor part of the ceiling fan The enlarged perspective view which shows the attachment state of the blade of the ceiling fan Cross-sectional view of a conventional ceiling fan

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ceiling surface 2 Motor 2A Motor 3 Blade 3A Blade 3B Blade 4 Root part 4A Root part 5 Tip part 6 Mounting angle 7 High functional part 8 Warpage width 9 Blade length 10 Groove 11 Blade cross-sectional shape 13 Fan outer diameter 14 Front edge 15 Blade cover 15A Blade cover 16 Curved surface 16A Curved surface 17 Blade mounting portion 18 Guide portion 19 Rotor 20 Blade boss 21 Temporary fixing means

Claims (10)

Provided with a plurality of blades radially arranged around the motor suspended from the ceiling surface, with a small mounting angle at the root and tip of the blade, and provided with a highly functional part near the center of the blade, A ceiling fan with a large mounting angle for highly functional parts. 2. The ceiling fan according to claim 1, wherein the warp width dimension of the root part and the tip part of the blade is made small, and the warp width dimension of the high-functional part provided near the center of the blade is made large. The ceiling fan according to claim 1 or 2, wherein the high-functional part of the blade is provided in a range of 15 to 80% of the blade length. The ceiling fan according to claim 1, wherein the high-functional part of the blade is distinguished from other parts by changing the surface roughness or forming a groove. The ceiling fan according to claim 1, wherein the blade cross-sectional shape at the base of the blade is formed into an S shape whose bending direction changes in the middle. The ceiling fan according to claim 1, wherein the blade is made of PPG. The ceiling fan according to claim 1, wherein a blade cover is provided at the base of the blade so as to cover the front edge of the blade. 8. The ceiling fan according to claim 7, wherein the blade cover provided at the front edge portion of the blade has a surface with a curved surface substantially equal to a root portion of the blade forming a smooth uneven surface. A blade mounting portion for mounting the blade to the motor is provided integrally with the blade cover, guide portions are provided on both sides of the blade mounting portion, and the guide portion can be fitted into a blade boss provided on the rotor of the motor. Item 9. A ceiling fan according to item 8. 10. The ceiling fan according to claim 9, further comprising a temporary fixing means capable of temporarily fixing the blade when the guide portion of the blade mounting portion is fitted into the blade boss formed on the rotor of the motor.

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